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In this activity, learners investigate the different salinity levels of oceans, rivers and estuaries.

In this outdoor, sunny day activity, learners experiment with paper leaf models to discover how some desert plants conserve water.

This activity uses LEGO® bricks to represent atoms bonding into molecules and crystals. The lesson plan is for a 2.5 hour workshop (or four 45-minute classes).

In this activity, learners conduct three experiments to examine temperature, the different stages of the water cycle, and how convection creates wind.

Learners build models to learn about the special cells and structures that plants use to move water from their roots up through the stems and leaves.

Did you know that the water we use today is the same water found on Earth millions of years ago? The Earth constantly uses and recycles water in a process called the water cycle.

In this weather-related activity, learners make a portable cloud in a bottle.

In this activity, learners create a biosphere in a baggie.